obama and clinton. early on, experts wondered whether their partnership would implode in a very public way. but now, as clinton winds down her time at the administration, she's leaving next week. so we take a closer look at how the parpshtnership started and grew. here is kate bolduan. >> reporter: facing questions together before here in a 2008 presidential debate with cnn's wolf blitzer. >> i don't want to just end the war but end the mind-set that got us into war in the first place. that's the kind of leadership i can provide. >> and, of course -- >> senator clinton, that's a clear swipe at you. >> really? >> back then, it was a very different relationship. in the midst of an already bitter rivalry. >> i was working on those streets, you were a corporate lawyer, sitting on the board of walmart. >> you were practicing law and representing your contributor, resco, in his slum landlord business in inner city chicago. >> reporter: but that relationship quickly changed. i endorse him and throw my full sup